<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
	<title>LFO Effects</title>

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</head>
<body>
	<tone-example label="LFO Effects">
		<div slot="explanation">
			These effects use an <a href="https://tonejs.github.io/docs/LFO">LFO</a> (Low Frequency Oscillator) to modulate the effect. Click and drag the dot to change the frequency and depth of the effect. 
			<br><br>
			Docs on <a href="https://tonejs.github.io/docs/AutoPanner">Tone.AutoPanner</a>, 
			<a href="https://tonejs.github.io/docs/AutoFilter">Tone.AutoFilter</a>, and
			<a href="https://tonejs.github.io/docs/Tremolo">Tone.Tremolo</a>
		</div>

		<div id="content">
			<tone-slider label="Panner" id="panner" units="hz" value="4" step="0.5" min="1" max="15"></tone-slider>
			<tone-play-toggle id="osc0"></tone-play-toggle>
			<tone-slider label="Filter" id="filter" units="hz" value="4" step="0.5" min="1" max="15"></tone-slider>
			<tone-play-toggle id="osc1"></tone-play-toggle>
			<tone-slider label="Tremolo" id="tremolo" units="hz" value="4" step="0.5" min="1" max="15"></tone-slider>
			<tone-play-toggle id="osc2"></tone-play-toggle>
		</tone-content>
	</tone-example>

	<script type="text/javascript">
		// AutoPanner - a panning modulation effect
		const panner = new Tone.AutoPanner({
			frequency: 4,
			depth: 1
		}).toDestination().start();

		// AutoFilter - a filter modulation effect
		const filter = new Tone.AutoFilter({
			frequency: 2,
			depth: 0.6
		}).toDestination().start();

		// Tremolo - an amplitude modulation effect
		const tremolo = new Tone.Tremolo({
			frequency: 0.6,
			depth: 0.7
		}).toDestination().start();

		// the input oscillators
		const pannerOsc = new Tone.Oscillator({ 
			volume: -12,
			type: "square6",
			frequency: "C4"
		}).connect(panner);

		const filterOsc = new Tone.Oscillator({ 
			volume: -12,
			type: "square6",
			frequency: "E4"
		}).connect(filter);

		const tremoloOsc = new Tone.Oscillator({ 
			volume: -12,
			type: "square6",
			frequency: "A4"
		}).connect(tremolo);

		// bind the interface
		document.querySelector("#osc0").addEventListener("start", () => pannerOsc.start());
		document.querySelector("#osc0").addEventListener("stop", () => pannerOsc.stop());
		document.querySelector("#panner").addEventListener("input", (e) => panner.frequency.value = parseFloat(e.target.value));
		document.querySelector("#osc1").addEventListener("start", () => filterOsc.start());
		document.querySelector("#osc1").addEventListener("stop", () => filterOsc.stop());
		document.querySelector("#filter").addEventListener("input", (e) => filter.frequency.value = parseFloat(e.target.value));
		document.querySelector("#osc2").addEventListener("start", () => tremoloOsc.start());
		document.querySelector("#osc2").addEventListener("stop", () => tremoloOsc.stop());
		document.querySelector("#tremolo").addEventListener("input", (e) => tremolo.frequency.value = parseFloat(e.target.value));
	</script>
	
</body>
</html>
